This is really fun. With Japanese artist Rintaro Hara‘s latest piece, visitors can make giant bubbles simply by pulling on a rope. By doing so, her Projection Wall raises a grid of ropes that have been dunked in a soapy solution. Then, as it’s rising, eight fans blow through to create a rainbow-y wall of extra-large bubbles. And, who doesn’t love a wall of bubbles?

This view comes courtesy Howard Wang, co-founder of Convoy Investments, who charted bitcoin’s massive gain against other famous periods of speculation, notably the Dutch tulip mania in the 1600s, which had previously reigned as history’s biggest.

When Tatsuo Horiuchi retired, he decided to try his hand at art. But instead of spending money on paints and brushes, Horiuchi used what he already had pre-installed on his computer—Microsoft Excel. Now, the 77-year-old artist is creating remarkably intricate digital masterpieces of the Japanese landscape, all on the free graphing software.